Electrically Confined Ballistic Devices Using Space Charge Boundaries
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic ballistic devices face challenges in defining boundaries within a two-dimensional electrode gas (2 DEG) layer without physical trench etching or doping, which complicates the process and limits flexibility in device design and functionality.
Innovation Solution
The use of confinement electrodes that generate space charge regions to electrically define boundaries within the 2 DEG layer, allowing for the creation of conduction channels and control of electron flow without the need for physical boundary formation, enabling flexible device configurations and applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical boundaries are formed by etching trenches or doping to define device boundaries in the 2 DEG layer, then the device structure is stable and well-defined, but the manufacturing process becomes complex and less flexible
Solution Approach 1:
The patent replaces mechanical/physical boundary formation methods (trench etching, doping) with an electrical field-based confinement mechanism. Confinement electrodes generate space charge regions that create potential barriers to define device boundaries without physical modifications to the 2 DEG layer, thereby simplifying the manufacturing process while maintaining device stability
Solution Approach 2:
The patent changes the state of the 2 DEG layer from a continuously doped or physically etched structure to an electrically modulated structure. By adjusting the voltage applied to confinement electrodes, the space charge regions dynamically adjust the potential landscape, enabling flexible boundary definition without altering the physical structure of the 2 DEG layer
2Manufacturing precision
If physical trenches are etched to define device boundaries, then clear separation and confinement are achieved, but the manufacturing steps increase and design flexibility is reduced
Solution Approach 1:
The patent substitutes mechanical trench etching with an electrical field-based confinement approach. Confinement electrodes generate space charge regions that create effective potential barriers, achieving precise boundary definition without physical trench formation, thereby simplifying manufacturing while maintaining boundary precision
Solution Approach 2:
The patent introduces dynamic control of device boundaries through voltage modulation of confinement electrodes. The boundaries are not fixed physical structures but can be dynamically adjusted by changing the electrical parameters, allowing flexible device design and reconfiguration without additional manufacturing steps
3Reliability
If doping is used to form PN junctions for boundary definition, then electrical boundaries are established, but the process complexity increases and device reconfigurability is limited
Solution Approach 1:
The patent implements dynamic and reconfigurable device boundaries through voltage-controlled space charge regions. Unlike fixed doped PN junctions, the confinement boundaries can be dynamically adjusted, enabled, or disabled by modulating the voltage on confinement electrodes, providing versatile device design and operational flexibility
Solution Approach 2:
The confinement electrodes serve multiple functions: they define device boundaries, control electron confinement, and enable dynamic reconfiguration of device operation. This multi-functional approach replaces the need for separate doped regions for each boundary, simplifying the device structure while enhancing adaptability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for the development of electrically confined ballistic devices with enhanced design flexibility, enabling low-power, high-frequency operations and integration into various circuits, including low-power circuits, power management, and photonic systems, while reducing the complexity of boundary formation processes.
Implementation Method 1
confinement electrodes which, in use, generate space charge regions that at least partially define a boundary of the ballistic device within the 2 DEG layer
Implementation Method 2
boundaries may be defined electrically, by electrodes overlying the 2 DEG layer which may selectively generate space charge regions which interrupt the 2 DEG layer and confine electrons within defined boundaries of the conduction channel
Data Source
AI summary
Embodiments are directed to electrically confined ballistic devices, circuits, and networks. One such device includes a heterostructure that has a first semiconductor layer, a second semiconductor layer, and a two-dimensional electrode gas (2DEG) layer between the first and second semiconductor layers. The device further includes an input electrode electrically coupled to the 2DEG layer and an output electrode electrically coupled to the 2DEG layer. A first confinement electrode is positioned on the heterostructure. The first confinement electrode, in use, generates first space charge regions which at least partially define a boundary of the ballistic device within the 2DEG layer between the input electrode and the output electrode in response to a first voltage.